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Last Updated on:
Monday, October 03, 2011 06:09 PM
Circuits Designed
by Dave Johnson, P.E. :
Model
Airplane Wing Tip Flasher
The circuit below is designed to flash two white LEDs mounted at the wing tips of a
model airplane. The flasher unit is powered by a 4.5v supply made of three AA
or AAA 1.5v alkaline battery cells. The average current is about 2ma so a set
of batteries should last about 1000 hours of flashing. The circuit uses one hex
Schmitt trigger inverter to perform all the timing functions. A single n-channel FET
drives the two LEDs, each with a peak current of about 20ma. The circuit
flashes the two LEDs in a pattern typical of commercial airplanes.
Links to electronic circuits, electronic schematics, designs for engineers,
hobbyists, students & inventors:
Precision Digital Altimeter - The current concept incorporates a
wireless transmitter and receiver and is thought to be used for remote
controlled airplanes or appliances with two seperate parts. In other words,
we have one dedicated transmitter (acquisition, filtering) and one dedicated
receiver part (user-interface, look-up table, calibration, storage),
capable....(added 4/05)
Servo Wiring Chart - After 1991 or so (I can't remember), most of
the major brands of servos became compatible with each other. You can use
any of these brands of servos with any brand of receiver. Some brands of
servos are really great for a particular use in a particular plane, and
there are other companies that sell their servos with each
different....(added 2/06)
Single Chip Builds Tiny Aircraft Receiver - 09/25/97 EDN-Design
Ideas....It's easy to become bored spending time in airports. After all, you can do
only so much work on a notebook computer with no reference material around. So, relax
and have some fun at the airport--build the tiny, single-chip, aircraft-band radio
in....[Design Idea by Steve Hageman, Hewlett-Packard, Santa Rosa, CA]
Speedy-2 - 6 10 Cells / 40 A Speedcontrollers for Model-Aircrafts
(electronic circuit added 11/06)
Speedy-3 - Speedcontrollers for Model-Aircrafts with optocoupler (schematic
added 11/06)
Speedy-BL - Speedcontrollers for Model-Aircrafts controller for brushless
and sensorless motors (electronic design added 11/06)
The Battery Eliminator Circuit - The Battery Eliminator Circuit, or BEC, is
one of the tools at our disposal to reduce weight in our electric models. A typical
four-cell 600mAh nickel cadmium (NiCd) battery supplied…. [Stefan Vorketter's web
site]
Versatile Miniature High-Rate ESC with BEC & Brake - This electronic speed
control (ESC) for brushed motors combines the features of two of my earlier designs.
One was a high-rate 30A ESC with a brake, and the other a high-rate 12A ESC with a BEC
(receiver battery eliminator circuit)….. [Stefan Vorketter]
